Cloud icon on apps and folders

The image below is my files on my MacBook Air. This MacBook is relatively new and I noticed today these clouds are sitting next to my applications. This has never happened before, they were never there, and I would like to know more about them and most importantly, how do I remove them? I never had this icon next to my apps and files and I know it has something to do with iCloud, but I don't really know or care about them much. If you could help, thanks!